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<?php |
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namespace Narrowspark\Arr; |
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use Narrowspark\Arr\Traits\ValueTrait; |
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class Traverse |
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{ |
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use ValueTrait; |
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/** |
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* Applies the callback to the elements of the given arrays |
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* |
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* @param array $array |
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* @param callable $callback |
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* |
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* @return array |
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*/ |
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public function map(array $array, callable $callback) |
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{ |
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$newArray = []; |
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foreach ($array as $key => $item) { |
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$result = call_user_func($callback, $item, $key); |
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$newArray = is_array($result) ? |
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array_replace_recursive($array, $result) : |
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array_merge_recursive($array, (array) $result); |
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} |
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return $newArray; |
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} |
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/** |
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* Filters each of the given values through a function. |
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* |
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* @param array $array |
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* @param callable $callback |
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* |
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* @return array |
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*/ |
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public function filter(array $array, callable $callback) |
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{ |
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$newArray = []; |
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foreach ($array as $key => $item) { |
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if (call_user_func($callback, $item, $key)) { |
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$newArray[$key] = $item; |
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} |
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} |
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return $newArray; |
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} |
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/** |
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* Returns whether every element of the array satisfies the given predicate or not. |
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* Works with Iterators too. |
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* |
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* @param array $array |
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* @param callable $predicate |
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* |
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* @return bool |
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*/ |
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public function all(array $array, callable $predicate) |
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{ |
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foreach ($array as $key => $value) { |
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if (! call_user_func($predicate, $value, $key, $array)) { |
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return false; |
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} |
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} |
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return true; |
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} |
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/** |
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* The opposite of filter(). |
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* |
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* @param array $array |
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* @param callable $callback Function to filter values. |
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* |
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* @return array filtered array. |
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*/ |
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public function reject(array $array, callable $callback) |
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{ |
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return $this->filter($array, function ($value, $key) use ($callback) { |
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return ! call_user_func($callback, $value, $key); |
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}); |
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} |
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/** |
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* Filter the array using the given Closure. |
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* |
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* @param array $array |
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* @param callable $callback |
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* |
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* @return array |
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*/ |
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public function where(array $array, callable $callback) |
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{ |
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$filtered = []; |
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foreach ($array as $key => $value) { |
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if (call_user_func($callback, $key, $value)) { |
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$filtered[$key] = $value; |
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} |
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} |
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return $filtered; |
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} |
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/** |
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* Return the first element in an array passing a given truth test. |
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* |
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* @param array $array |
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* @param callable $callback |
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* @param mixed $default |
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* |
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* @return mixed |
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*/ |
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public function first(array $array, callable $callback, $default = null) |
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{ |
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if (is_null($callback)) { |
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if (empty($array)) { |
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return value($default); |
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} |
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foreach ($array as $item) { |
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return $item; |
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} |
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} |
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foreach ($array as $key => $value) { |
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if (call_user_func($callback, $key, $value)) { |
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return $value; |
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} |
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} |
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return $this->value($default); |
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} |
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/** |
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* Return the last element in an array passing a given truth test. |
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* |
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* @param array $array |
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* @param callable $callback |
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* @param mixed $default |
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* |
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* @return mixed |
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*/ |
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1 |
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public function last(array $array, callable $callback, $default = null) |
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{ |
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if (is_null($callback)) { |
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return empty($array) ? $this->value($default) : end($array); |
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} |
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return $this->first(array_reverse($array), $callback, $default); |
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} |
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} |
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narrowspark /
arr
